Optically Controlled Ultrafast Enhanced Transmission from a Sub-wavelength Aperture in a Planar Metal Film

2011 ◽  
Author(s):  
Mohamed A. Swillam ◽  
Nir Rotenberg ◽  
Henry M. van Driel
Keyword(s):  
Metal Film ◽  
Enhanced Transmission ◽  
Sub Wavelength

scholarly journals Observing and controlling a Tamm plasmon at the interface with a metasurface

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 897-903 ◽  
Author(s):  
Oleksandr Buchnev ◽  
Alexandr Belosludtsev ◽  
Victor Reshetnyak ◽  
Dean R. Evans ◽  
Vassili A. Fedotov
Keyword(s):  
Liquid Crystal ◽  
Metal Film ◽  
Near Infrared ◽  
Thin Metal Film ◽  
Outer Side ◽  
Spectral Position ◽  
External Perturbations ◽  
Dielectric Mirror ◽  
Wavelength Scale ◽  
Sub Wavelength

AbstractWe demonstrate experimentally that Tamm plasmons in the near infrared can be supported by a dielectric mirror interfaced with a metasurface, a discontinuous thin metal film periodically patterned on the sub-wavelength scale. More crucially, not only do Tamm plasmons survive the nanopatterning of the metal film but they also become sensitive to external perturbations as a result. In particular, by depositing a nematic liquid crystal on the outer side of the metasurface, we were able to red shift the spectral position of Tamm plasmon by 35 nm, while electrical switching of the liquid crystal enabled us to tune the wavelength of this notoriously inert excitation within a 10-nm range.

scholarly journals Enhanced transmission through a sub-wavelength aperture: resonant approaches employing metamaterials

2009 ◽  
Vol 11 (11) ◽  
pp. 114029 ◽  
Author(s):  
Filiberto Bilotti ◽  
Luca Scorrano ◽  
Ekmel Ozbay ◽  
Lucio Vegni
Keyword(s):  
Enhanced Transmission ◽  
Sub Wavelength

Theory of Thermal Emissivity and Enhanced Absorption in Sub-wavelength Metallo-Dielectric Photonic Crystals

2007 ◽  
Vol 1014 ◽  
Author(s):  
Rana Biswas ◽  
Irina Puscasu ◽  
Martin Pralle ◽  
Martin McNeal ◽  
Anton Greenwald ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Thermal Emission ◽  
Metal Layer ◽  
Hole Array ◽  
Enhanced Transmission ◽  
Enhanced Absorption ◽  
Guided Mode ◽  
Thermal Emissivity ◽  
Sub Wavelength

AbstractMetallo-dielectric photonic crystals are sharp thermal emitters at infrared wavelengths, and are being employed in sensors. We describe the theory of thermal emission and enhanced absorption in these photonic crystals using a scattering matrix approach, where Maxwell's equations are solved in Fourier space. A sub-wavelength hole array in a metal layer is coupled to a two-dimensional photonic crystal of the same periodicity in these metallo-dielectric photonic crystals. The sub-wavelength hole array has an enhanced transmission mode that couples to a weakly guided mode of the photonic crystal having similar modal character. The transmissive mode of the hole array is absorbed by the photonic crystal to create a sharp absorption and reflective minimum. The enhanced absorption is investigated in different lattice symmetries.

Enhancement of Optical Transmission Through Planar Nano-Apertures in a Metal Film

2003 ◽  
Author(s):  
Eric X. Jin ◽  
Xianfan Xu
Keyword(s):  
Metal Film ◽  
Incident Light ◽  
Near Field ◽  
Transmission Efficiency ◽  
Localized Surface Plasmon ◽  
Fabry Perot ◽  
Wavelength Resolution ◽  
Signal Contrast ◽  
Negative Role ◽  
Sub Wavelength

In this work, we investigate transmission enhancement through ridged-apertures of nanometer size in a metal film in the optical frequency range. It is demonstrated that the fundamental propagation TE10 mode concentrated in the gap between the two ridges of the aperture provides transmission efficiency higher than unity, and the size of the gap between the two ridges determines the sub-wavelength resolution. Fabry-Perot-like resonance with respect to the thickness of the aperture and the red-shift phenomena with respect to the wavelength of the incident light are observed. As a comparison, transmission through regular apertures is also computed, and is found much lower. Localized surface plasmon (LSP) is excited on the edges of the aperture in a silver film but plays a negative role with respect to the field concentration and signal contrast. With optimized geometries, the ridged apertures are capable of achieving sub-wavelength resolution in the near field with transmission efficiency above unity and high contrast.

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